regen win32/config*

[p5sagit/p5-mst-13.2.git] / utf8.c

diff --git a/utf8.c b/utf8.c
index 0153fd6..223f5ac 100644 (file)
--- a/utf8.c
+++ b/utf8.c
@@ -1,6 +1,6 @@
 /*    utf8.c
  *
- *    Copyright (c) 1998-1999, Larry Wall
+ *    Copyright (c) 1998-2000, Larry Wall
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -84,6 +84,11 @@ Perl_uv_to_utf8(pTHX_ U8 *d, UV uv)
 #ifdef HAS_QUAD
     {
        *d++ =                        0xff;     /* Can't match U+FFFE! */
+       *d++ =                        0x80;     /* 6 Reserved bits */
+       *d++ = (((uv >> 60) & 0x0f) | 0x80);    /* 2 Reserved bits */
+       *d++ = (((uv >> 54) & 0x3f) | 0x80);
+       *d++ = (((uv >> 48) & 0x3f) | 0x80);
+       *d++ = (((uv >> 42) & 0x3f) | 0x80);
        *d++ = (((uv >> 36) & 0x3f) | 0x80);
        *d++ = (((uv >> 30) & 0x3f) | 0x80);
        *d++ = (((uv >> 24) & 0x3f) | 0x80);
@@ -96,6 +101,39 @@ Perl_uv_to_utf8(pTHX_ U8 *d, UV uv)
 #endif
 }
 
+/* Tests if some arbitrary number of bytes begins in a valid UTF-8 character.
+ * The actual number of bytes in the UTF-8 character will be returned if it
+ * is valid, otherwise 0. */
+int
+Perl_is_utf8_char(pTHX_ U8 *s)
+{
+    U8 u = *s;
+    int slen, len;
+
+    if (!(u & 0x80))
+       return 1;
+
+    if (!(u & 0x40))
+       return 0;
+
+    if      (!(u & 0x20))      { len = 2; }
+    else if (!(u & 0x10))      { len = 3; }
+    else if (!(u & 0x08))      { len = 4; }
+    else if (!(u & 0x04))      { len = 5; }
+    else if (!(u & 0x02))      { len = 6; }
+    else if (!(u & 0x01))      { len = 7; }
+    else                       { len = 13; } /* whoa! */
+
+    slen = len - 1;
+    s++;
+    while (slen--) {
+       if ((*s & 0xc0) != 0x80)
+           return 0;
+       s++;
+    }
+    return len;
+}
+
 UV
 Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
 {
@@ -120,8 +158,8 @@ Perl_utf8_to_uv(pTHX_ U8* s, I32* retlen)
     else if (!(uv & 0x08))     { len = 4; uv &= 0x07; }
     else if (!(uv & 0x04))     { len = 5; uv &= 0x03; }
     else if (!(uv & 0x02))     { len = 6; uv &= 0x01; }
-    else if (!(uv & 0x01))     { len = 7; uv &= 0x00; }
-    else                         len = 8;      /* whoa! */
+    else if (!(uv & 0x01))     { len = 7;  uv = 0; }
+    else                       { len = 13; uv = 0; } /* whoa! */
 
     if (retlen)
        *retlen = len;
@@ -255,7 +293,7 @@ Perl_utf16_to_utf8_reversed(pTHX_ U16* p, U8* d, I32 bytelen)
 bool
 Perl_is_uni_alnum(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_alnum(tmpbuf);
 }
@@ -263,7 +301,7 @@ Perl_is_uni_alnum(pTHX_ U32 c)
 bool
 Perl_is_uni_alnumc(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_alnumc(tmpbuf);
 }
@@ -271,7 +309,7 @@ Perl_is_uni_alnumc(pTHX_ U32 c)
 bool
 Perl_is_uni_idfirst(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_idfirst(tmpbuf);
 }
@@ -279,7 +317,7 @@ Perl_is_uni_idfirst(pTHX_ U32 c)
 bool
 Perl_is_uni_alpha(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_alpha(tmpbuf);
 }
@@ -287,7 +325,7 @@ Perl_is_uni_alpha(pTHX_ U32 c)
 bool
 Perl_is_uni_ascii(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_ascii(tmpbuf);
 }
@@ -295,7 +333,7 @@ Perl_is_uni_ascii(pTHX_ U32 c)
 bool
 Perl_is_uni_space(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_space(tmpbuf);
 }
@@ -303,7 +341,7 @@ Perl_is_uni_space(pTHX_ U32 c)
 bool
 Perl_is_uni_digit(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_digit(tmpbuf);
 }
@@ -311,7 +349,7 @@ Perl_is_uni_digit(pTHX_ U32 c)
 bool
 Perl_is_uni_upper(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_upper(tmpbuf);
 }
@@ -319,7 +357,7 @@ Perl_is_uni_upper(pTHX_ U32 c)
 bool
 Perl_is_uni_lower(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_lower(tmpbuf);
 }
@@ -327,7 +365,7 @@ Perl_is_uni_lower(pTHX_ U32 c)
 bool
 Perl_is_uni_cntrl(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_cntrl(tmpbuf);
 }
@@ -335,7 +373,7 @@ Perl_is_uni_cntrl(pTHX_ U32 c)
 bool
 Perl_is_uni_graph(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_graph(tmpbuf);
 }
@@ -343,7 +381,7 @@ Perl_is_uni_graph(pTHX_ U32 c)
 bool
 Perl_is_uni_print(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_print(tmpbuf);
 }
@@ -351,7 +389,7 @@ Perl_is_uni_print(pTHX_ U32 c)
 bool
 Perl_is_uni_punct(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_punct(tmpbuf);
 }
@@ -359,7 +397,7 @@ Perl_is_uni_punct(pTHX_ U32 c)
 bool
 Perl_is_uni_xdigit(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return is_utf8_xdigit(tmpbuf);
 }
@@ -367,7 +405,7 @@ Perl_is_uni_xdigit(pTHX_ U32 c)
 U32
 Perl_to_uni_upper(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return to_utf8_upper(tmpbuf);
 }
@@ -375,7 +413,7 @@ Perl_to_uni_upper(pTHX_ U32 c)
 U32
 Perl_to_uni_title(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return to_utf8_title(tmpbuf);
 }
@@ -383,7 +421,7 @@ Perl_to_uni_title(pTHX_ U32 c)
 U32
 Perl_to_uni_lower(pTHX_ U32 c)
 {
-    U8 tmpbuf[10];
+    U8 tmpbuf[UTF8_MAXLEN];
     uv_to_utf8(tmpbuf, (UV)c);
     return to_utf8_lower(tmpbuf);
 }
@@ -495,6 +533,8 @@ Perl_to_uni_lower_lc(pTHX_ U32 c)
 bool
 Perl_is_utf8_alnum(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_alnum)
        PL_utf8_alnum = swash_init("utf8", "IsAlnum", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_alnum, p);
@@ -510,6 +550,8 @@ Perl_is_utf8_alnum(pTHX_ U8 *p)
 bool
 Perl_is_utf8_alnumc(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_alnum)
        PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_alnum, p);
@@ -531,6 +573,8 @@ Perl_is_utf8_idfirst(pTHX_ U8 *p)
 bool
 Perl_is_utf8_alpha(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_alpha)
        PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_alpha, p);
@@ -539,6 +583,8 @@ Perl_is_utf8_alpha(pTHX_ U8 *p)
 bool
 Perl_is_utf8_ascii(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_ascii)
        PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_ascii, p);
@@ -547,6 +593,8 @@ Perl_is_utf8_ascii(pTHX_ U8 *p)
 bool
 Perl_is_utf8_space(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_space)
        PL_utf8_space = swash_init("utf8", "IsSpace", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_space, p);
@@ -555,6 +603,8 @@ Perl_is_utf8_space(pTHX_ U8 *p)
 bool
 Perl_is_utf8_digit(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_digit)
        PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_digit, p);
@@ -563,6 +613,8 @@ Perl_is_utf8_digit(pTHX_ U8 *p)
 bool
 Perl_is_utf8_upper(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_upper)
        PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_upper, p);
@@ -571,6 +623,8 @@ Perl_is_utf8_upper(pTHX_ U8 *p)
 bool
 Perl_is_utf8_lower(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_lower)
        PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_lower, p);
@@ -579,6 +633,8 @@ Perl_is_utf8_lower(pTHX_ U8 *p)
 bool
 Perl_is_utf8_cntrl(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_cntrl)
        PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_cntrl, p);
@@ -587,6 +643,8 @@ Perl_is_utf8_cntrl(pTHX_ U8 *p)
 bool
 Perl_is_utf8_graph(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_graph)
        PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_graph, p);
@@ -595,6 +653,8 @@ Perl_is_utf8_graph(pTHX_ U8 *p)
 bool
 Perl_is_utf8_print(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_print)
        PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_print, p);
@@ -603,6 +663,8 @@ Perl_is_utf8_print(pTHX_ U8 *p)
 bool
 Perl_is_utf8_punct(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_punct)
        PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_punct, p);
@@ -611,6 +673,8 @@ Perl_is_utf8_punct(pTHX_ U8 *p)
 bool
 Perl_is_utf8_xdigit(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_xdigit)
        PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_xdigit, p);
@@ -619,6 +683,8 @@ Perl_is_utf8_xdigit(pTHX_ U8 *p)
 bool
 Perl_is_utf8_mark(pTHX_ U8 *p)
 {
+    if (!is_utf8_char(p))
+       return FALSE;
     if (!PL_utf8_mark)
        PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0);
     return swash_fetch(PL_utf8_mark, p);
@@ -665,6 +731,13 @@ Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
     SV* retval;
     char tmpbuf[256];
     dSP;    
+
+    if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
+       ENTER;
+       Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
+       LEAVE;
+    }
+    SPAGAIN;
     PUSHSTACKi(PERLSI_MAGIC);
     PUSHMARK(SP);
     EXTEND(SP,5);